Code coverage metrics in Software Engineering - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is code coverage in software testing?

Code coverage is a measure that shows how much of the source code is tested by automated tests. It helps identify untested parts of a program.

beginner

Name the four common types of code coverage metrics.

The four common types are:<br>1. Line coverage<br>2. Branch coverage<br>3. Function coverage<br>4. Condition coverage

intermediate

What does branch coverage measure?

Branch coverage measures whether each possible branch (true or false) in decision points like if-else statements has been executed during testing.

intermediate

Why is 100% code coverage not always enough to guarantee bug-free software?

Because code coverage only shows which code was run, not whether the tests checked for correct behavior. Tests might run code without verifying results.

beginner

How can code coverage help improve software quality?

By showing which parts of code are not tested, developers can add tests to cover those areas, reducing the chance of hidden bugs.

Which code coverage type checks if every line of code has been executed?

A Function coverage

B Branch coverage

C Line coverage

D Condition coverage

Line coverage measures whether each line of code has been run during testing.

What does branch coverage focus on?

A Testing all functions

B Testing all decision paths

C Executing all lines

D Checking all variables

Branch coverage ensures all possible paths in decision points like if-else are tested.

If a test runs code but does not check if the output is correct, what does this imply about code coverage?

A Coverage is high but tests may be ineffective

B Coverage is low

C Tests are perfect

D Code is bug-free

Code coverage shows code was run, but without checking correctness, tests might miss bugs.

Which of these is NOT a common code coverage metric?

A Memory coverage

B Branch coverage

C Function coverage

D Line coverage

Memory coverage is not a standard code coverage metric.

How does code coverage help developers?

A By writing code for developers

B By fixing bugs automatically

C By running the software faster

D By showing untested code areas

Code coverage highlights which parts of code lack tests, guiding developers to improve testing.

Explain what code coverage metrics are and why they are useful in software testing.

Think about how testing shows which parts of code are checked.

Describe the difference between line coverage and branch coverage.

Consider simple code with if statements.